how to convert a data.frame to tree structure object such as dendrogram

You will have to decide what R data structure is a "tree structure". But
maybe this will get you started:
foo <- data.frame(x=c('A','A','B','B'), y=c('Ab','Ac','Ba','Bd'))
split(foo$y, foo$x)
$A
[1] "Ab" "Ac"

$B
[1] "Ba" "Bd"

I suppose it is at least a little bit tree-like.
Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062

On 3/10/13 9:19 PM, "Not To Miss" <not.to.miss at gmail.com> wrote:

>I have a data.frame object like:
>
>> data.frame(x=c('A','A','B','B'), y=c('Ab','Ac','Ba','Bd'))
>  x  y
>1 A Ab
>2 A Ac
>3 B Ba
>4 B Bd
>
>how could I create a tree structure object like this:
>     |---Ab
> A---|
>_|   |---Ac
> |
> |   |---Ba
> B---|
>     |---Bb
>
>Thanks,
>Zech
>
>	[[alternative HTML version deleted]]
>
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how to convert a data.frame to tree structure object such as dendrogram

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